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Remote | Software Engineer (GitHub Contributor) — $50–$100/hour
Freelance, fully remote contract role for experienced backend software engineers to support AI training and evaluation: designing coding challenges, building reproducible reinforcement-learning environments and deterministic verifiers, and writing golden reference solutions. Core stack: Python 3, Java, Rust, Go, C++, or TypeScript.
Senior Machine Learning Engineer
Senior Machine Learning Engineer (Grade 7) at the UK Department for Business and Trade's DDaT directorate. Leads design, deployment and MLOps standards for production-grade ML/AI services, providing technical direction, championing responsible AI, and coaching teams. Python-centric work in hybrid, multidisciplinary government teams.
Machine Learning Engineer II
Build and deploy production ML models for adMarketplace's native search advertising platform — relevance, ranking, CTR/CVR prediction, and bidding — owning the full ML lifecycle with MLOps, low-latency serving, and A/B testing. Core stack: Python, SQL, Spark/Hadoop, TensorFlow/PyTorch, cloud infrastructure.
Principal Engineer, AI/ML Security
Leads DigitalOcean's AI/ML security: owns the AI security strategy and multi-year roadmap, builds in-house ML guardrails and security tooling, runs AI red-teaming and threat modeling across the ML lifecycle, and owns AI risk & governance. Core stack: Python, Go, adversarial ML, LLM/RAG security, MITRE ATLAS and NIST AI RMF.
Data Scientist, Principal
Build and maintain enterprise data systems and AI-driven workflows in Python/SQL, ensuring data quality and enabling agentic applications for a data-center and AI infrastructure company.


